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1194 Aletta (1931 JG)
Classification: Main-belt Asteroid          SPK-ID: 2001194
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09111003645550993 4.7383e-08  
a 2.912775652049873 1.174e-08 au
q 2.647392556204887 1.3652e-07 au
i 10.87042323783806 3.7825e-06 deg
node 291.2939063837486 2.5423e-05 deg
peri 243.4435839036 3.2672e-05 deg
M 16.25528074352692 1.9626e-05 deg
tp 2458918.511875078334
(2020-Mar-10.01187508)
9.9052e-05 TDB
period 1815.762239821864
4.97
1.0977e-05
3.005e-08
d
yr
n .1982638431975091 1.1986e-09 deg/d
Q 3.178158747894859 1.2809e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2552  
   data-arc span      32581 days (89.20 yr)  
   first obs. used      1931-05-20  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37412  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:29:53  

Additional Information
 Earth MOID = 1.67522 au 
 Jupiter MOID = 1.93391 au 
 T_jup = 3.250 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.7   n/a MPO435707  
diameter diameter 41.358 km 0.191 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 20.39 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Brinsfield, J.W. (2008) Minor Planet Bull. 35, 86-87.]
[Oey, J. (2011) Minor Planet Bull. 38, 221-223.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.087   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1194 Aletta (1931 JG)          Discovered 1931-May-13 by Jackson, C. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1931 JG = 1946 KC = 1962 SB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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